Reenforcement for brake shoes



P. FREEMAN AND l. E. SHAKER.

REENFORCEIAENT FOR BRAKE SHGES.

APPLlCATlON FILED DEC. 13, 1919.

Jam. 17, 1922u AUNIT!)ST .1\TES PATENT o;

'IETER FREEMAN AND IVEN E. STRAKER, OF CHATTNGA, 1"

mimrroitemuslimV 1to1?. BRAKE sirens.

Application tiled December 13,y 1919. Serial No. 344,643.

ofthe invention, such as will enable othersskilled in the art to whichit appertains to make and use the same. The present invention relates tobrake slices. and has particular reference to a novel reenforcement forstrengthening the same,

The object of the present invention is to provide a reenforcementadapted to strengthen the body part of the shoe and to also strengthenthe attaching lng by means of 'which the shoe is secured tol the'brakehead, the reenforc'ement not only strengthening this lug but serving asa lug itself should the usual lu'g become broken or worn.

Another object is to provide a reenforcement which embodies simplicityin construction .l and 'economy in material, the reenforcement beingmade of but two -lengths of wire which are peculiarly. interconnectedand formed to provide the double reenforcelment `for the back of theshoe and th-lug of the shoe. Y

Wi'ththese and further objects yiew as will in part hereinafter becomeapparent and in part be stated, the invention comprises certain novelconstructions, combinations and arrangements of parts as subsequentlyspecified and claimed.

In the accompanying drawing,`-

Figure 1 is a side elevation of a brake shoe reenforced according to thepresent invention.

Figure 2 is a longitudinal section taken centrally through the same.

Figure 3 is a rear face elevation ofthe reenforced brake shoe. l

Figure 4C is a detail, perspectiveview of the improved reeirforcementprior'to being embedded in the brake shoe.

Figure 5 is a transverse section taken midway between the ends of thebrake shoe showing the attaching lugand the reenforcement embeddedtherein.

Referring to the drawing by numerals, 10 designates the body of a brakeshoe which is of ordinary construction and made preferably of cast metalof arcuate form to em- Speccation of Letters Yatent.

shoe l vantage in brace the periphery' of a wheel the usual attachinging 11 .or f locking pin'which holds the bi' the brake head. The lug 11is pr a transverse opening 12 through locking key is secured, and thefrom the rear face of thesh( e and er substantially across the entirewidth l The reenforcement of this invention ce prises two strands of'wire of equai ler which are first 'twisted together intermedi theirends to provide a part which is c double thickness. From the doublethick the ends of the wire strands are bent in a posite directions toform arms 1S at each end ofthe double thick part, and the said doablethick part is arched upwardly from the meeting ends of the arms 13 'toform a lug loop 14;. The free ends of the arms a bent inwardly towardeach other to ff anchoring fingers 15 which may be used and are adaptedtoseat in the opposite ends of the brake shoe body 10 to anchor theenforcement in the body.

The loop 111 is formed of sir and height to project upwardig, atopposite sides and across .the to; pin receiving opening 12. The iooptherefore', `forms an encircling re ment for that part of the brake shoDi which the retaining pin passes ff ing 4the brake shoe and holding thebrake hea '-.shouifh for any r lug 11 becom `broken or distorted. 14 isheld to the body of the br the relativelylong arms 13 nl longitudinallyin the back of the 10 and near the opposite edges o The loop 14 is thusfirmly inc body of the brake shoe and should si become cracked orbroken, the rigidi reenforcement is not impairede but., on other hand.the fragments of tht inw maintained in proper relation separation byvthe doubie tl.,V loop 14.

As the thickness of ti great above the openn mediate or bridge portion-is preferably fiattened, as

igures -2 and '12, 'to bar which extends in the ing top ofthe opening1Q. This the upper and lower sides of brings the wire strands into rtactat those portions which are twisted about each other, so that thereeniorcement as a VWhole is formed into substantially an inreadily flowinto the interstiees in the loop i4 by reason of the twisting togetheroi' the strands and may freely cover and Collect about all sides andcorners oit the two wire-s. The two wires which forni the reenforeementare thuspraetically embedded in the brake shoe body and lug andconstitute a part thereof.

It will be observed that each wire strand has an arm 13 in one end ofthe brake shoe4 l0, that said arm extends through the twisted loop 14and emerges at the other side of the brake shoe in an arm 13 whichextends lon gitudinally in the brake shoe and toward the opposite endthereof. in this manner each end of the reenforeement is braeed upontheother end so that the pair of arios 13 at one end of thereenioreement'cennot swing or hinge upon the other pair of arms. Thisnot only increases the strength and resistance ot the reenforcelnentwhen in ose7 but also enables the correct holdingt the reentoreementwith its 'arms 13 in proper relation during the molding process.

What is claimed is l. A reenforcenient for brake shoes eompiising Wirestrands adapted to he embedded in the body of a brake shoe and hai/'ing'inf tertwisted portions looped upwardly through the lug of the brakeshoe for reenforeing the same.

2. A reentoroement for brake shoes Comprising ,vire strands embeddedlongitudinally in thefbaek of the brake shoe and havu inge, portionsextending upwardly and twisted together in the lug of the brake shoe.

3. A reenforcement for brake shoes eomprising wire strttnds embeddedlongitudinally in the haelt of the bralie shoe and having intertwlstedportions forming a double thick loopot a height and width adapted toextend 'upwardly in the lug; ot' the brake shoe :i ,tosses at oppositesides and across the top of the key-hole in the lug.

e. A Renforcement for brake shoes oomprising a pair of wire strandstwisted tol@other intermediate their ends and formed into an upwardlyextending loop at the place of the twist, the free end portions of theWire strands being bent in opposite directions to torni arms, said armsbeing adapted to be embedded in the back of a brakeslioe 'with said loopembedded in the lug of the brake shoe. y

A. reenoroenient for brake shoes cornprising a pair ot lwire strandstwisted together at their intermediateportions and the .double thieltportion being bent to provide an upwardly extending loop, the free endsof one wire strand extending from the opposite ends of the loop inopposite directions and the wire strands providing oppositelyextending@f arms adapted to be embedded in the back o? a brake shoe-.For supporting the loop in the lug;- o'f the brake shoe.

. vreenforcement for brake shoes comprising a pair of wire strands bentinto substantially ttl-shape with the portions forming the U twistedtogether.y the tree end portions of the wire strands diverging inopposite directions to form arms adapted to be embedded in the body ofthe brake shoe for supporting the twisted portions the-root in the lugof the brake shoe.

7. A. reeniorceinent 'for brake shoes eomprisingr wire strandsadapted tobe embedded in the body of a brake shoe and having an intermediatetwisted portion looped to be embedded in the lug of the brake shoe and vto extend about the aperture ot lug, said twisted portion being dattenedto reduee the thickness above said aperture and to inorease thehoiriding` with the material of the has? f ln testimony whereof We atlixour signatures in presente ot two witm-,sses4 ljl'llll' Fltl t'ltlill.lVlCN l'. S'llililt.

lilitiiesses as to lotger Freeman:

iii. (kuni Evans, C.' l. LYNN. vt'i'vitnesses as to iron l?. Stroker:

T. il. limon, M. ADAMS.

